ATmega 32U4 has a hardware support for fullspeed USB, thus polling rate 1000Hz is not an issue for ... Two footprints are not trivial: DB9 male socket (J1) and SPDT switch (SW2). J2 is redundant -- ...

This simple project was initiated to support the use of Amiberry and using DB9 based joysticks directly without needing to burn USB ports, however as this is based on works for retropie, it can ...

To find out, [John] embarked on a mission to build a USB adapter for his ... mouse utilizes an unusual male DE9 connector rather than the more familiar female DB9 used in RS232 serial mice.